Humanoid Blender Animations spazzing out

Hey all

I Have a auto rigged character from mixamo with some basic animations aswell.

i imported the character into blender and made my animation(very basic animation of the character leaning)i exported it as a fbx and imported it into unity.

In the inspector i set it to Humanoid and created the avatar from the same mixamo character i imported into unity earlier.

when i view/preview the animation in the inspector it works fine

but when i apply it to my Animator Controller it either spazzes out like crazy or doesn't do anything depending on if its override or additive.

My question is what am i doing wrong. could any one link me a good tutorial because i don't have much experience in blender

Thanks you ~Scott